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Finding the Fourth Proportional to 258,183.48, 386,446.41 and 137,939.94

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Solution

The fourth proportional to 258,183.48, 386,446.41 and 137,939.94 is: 206,467.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,183.48 : 386,446.41 = 137,939.94 : x
  2. Step 2: Convert to fraction form
    258,183.48/386,446.41 = 137,939.94/x
  3. Step 3: Cross multiply
    258,183.48x = 386,446.41 × 137,939.94
  4. Step 4: Simplify right side
    258,183.48x = 53,306,394,608.62
  5. Step 5: Solve for x
    x = 53,306,394,608.62/258,183.48
  6. Step 6: Final answer
    x = 206,467.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.